Definitions by MC World

G.B.B. 

Acronym for Gay Black Bestie, a best friend who happens to be gay and black.

Hey, Cooper, I didn't know you were gay.
I guess now you are my G.B.B.

WTF does -that- mean?

It means you're my gay black bestie!

G.B.B. by MC World January 4, 2009